In Flipside, if you have Boomer, go to the right and blow it up to make a hole in the wall. Flip to 3D and go through and to the left is the card shop.
In the bathroom stall.
In a bathroom stall.
you give him some paper you find that i think has a clue on it
Chapter 1-1
You will "find" him after chapter 6.
Itty bits in flipside.
you will find her at Flopside somewhere when you finish the game
u look 4 em'
use the key you find.
As sap soup is only available in Super Paper Mario, you get it sometimes when you defeat Floro Sapiens in chapter 5.
Ive been trying to find out the same thing, But so far ive found out that its in the card shop (Flopside And Flipside) Im trying to figure out another way.
go to the place with the blocks and troopas and fall down to find it